linux-stable.git/include/linux/interrupt.h, branch linux-2.6.25.y

include/linux: Remove all users of FASTCALL() macro

2008-02-14T00:21:18+00:00

FASTCALL() is always expanded to empty, remove it.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Harvey Harrison 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

proper show_interrupts() prototype

2008-02-06T18:41:02+00:00

Add a proper prototype for show_interrupts() in include/linux/interrupt.h

Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Preempt-RCU: Use softirq instead of tasklets for

2008-01-25T20:08:23+00:00

This patch makes RCU use softirq instead of tasklets.

It also adds a memory barrier after raising the softirq
inorder to ensure that the cpu sees the most recently updated
value of rcu->cur while processing callbacks.
The discussion of the related theoretical race pointed out
by James Huang can be found here --> http://lkml.org/lkml/2007/11/20/603

Signed-off-by: Gautham R Shenoy 
Signed-off-by: Steven Rostedt 
Signed-off-by: Dipankar Sarma 
Reviewed-by: Steven Rostedt 
Signed-off-by: Ingo Molnar

Completely remove deprecated IRQ flags (SA_*)

2007-10-17T15:43:00+00:00

Only very little files use the deprecated SA_* IRQ flags in latest pull.  This
patch series removes such macros from the tree and transfrom old code to the
new IRQF_* flags.

I've grepped the whole tree to make sure that no more files than the patched
ones use such deprecated macros.  I hope this series won't introduce build
errors.

Signed-off-by: Ahmed S. Darwish 
Cc: Ralf Baechle 
Cc: James Bottomley 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

provide stubs for enable_irq_wake() and disable_irq_wake()

2007-10-16T16:42:50+00:00

Provide {enable,disable}_irq_wakeup dummies for undefined
cross-compilers for platforms without CONFIG_GENERIC_IRQ.

Needed by wake-up-from-a-serial-port.patch

Signed-off-by: Guennadi Liakhovetski 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rip some includes from linux/interrupt.h

2007-07-29T02:42:22+00:00

Signed-off-by: Al Viro 
Acked-by: Jeff Garzik 
Signed-off-by: Linus Torvalds

take declarations of enable_irq() et.al. to linux/interrupt.h

2007-07-22T18:44:00+00:00

Now that the last inlined instances are gone, all that is left to do
is turning disable_irq_nosync on arm26 and m68k from defines to aliases
and we are all set - we can make these externs in linux/interrupt.h
uncoditional and kill remaining instances in asm/irq.h

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

Add hard_irq_disable()

2007-05-11T15:29:34+00:00

Some architectures, like powerpc, implement lazy disabling of interrupts.
That means that on those, local_irq_disable() doesn't actually disable
interrupts on the CPU, but only sets some per CPU flag which cause them to be
disabled only if an interrupt actually occurs.

However, in some cases, such as stop_machine, we really want interrupts to be
fully disabled.  For example, I have code using stop machine to do ECC error
injection, used to verify operations of the ECC hardware, that sort of thing.
It really needs to make sure that nothing is actually writing to memory while
the injection happens.  Similar examples can be found in other low level bits
and pieces.

This patch implements a generic hard_irq_disable() function which is meant to
be called -after- local_irq_disable() and ensures that interrupts are fully
disabled on that CPU.  The default implementation is a nop, though powerpc
does already provide an appropriate one.

Signed-off-by: Benjamin Herrenschmidt 
Cc: Rusty Russell 
Cc: Paul Mackerras 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Add IRQF_IRQPOLL flag (common code)

2007-05-08T18:15:22+00:00

irqpoll is broken on some architectures that don't use the IRQ 0 for the timer
interrupt like IA64.  This patch adds a IRQF_IRQPOLL flag.

Each architecture is handled in a separate pach.  As I left the irq == 0 as
condition, this should not break existing architectures that use timer_irq ==
0 and that I did't address with that patch (because I don't know).

This patch:

This patch adds a IRQF_IRQPOLL flag that the interrupt registration code could
use for the interrupt it wants to use for IRQ polling.

Because this must not be the timer interrupt, an additional flag was added
instead of re-using the IRQF_TIMER constant.  Until all architectures will
have an IRQF_IRQPOLL interrupt, irq == 0 will stay as alternative as it should
not break anything.

Also, note_interrupt() is called on CPU-specific interrupts to be used as
interrupt source for IRQ polling.

Signed-off-by: Bernhard Walle 
Cc: Russell King 
Cc: Kyle McMartin 
Cc: Matthew Wilcox 
Cc: Grant Grundler 
Cc: Paul Mundt 
Cc: "Luck, Tony" 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Deprecate SA_xxx interrupt flags -V2

2007-05-08T18:15:08+00:00

The deprecation of the SA_xxx interrupt flags did not emit deprecated
warnings. Andrew said about the removal of the deprecated flag defines:

> This is going to break a lot of external stuff.  We should have found
> a way to make usage of SA_* emit deprecated warnings (or _some_
> warning) to warn people of impending doom.  But I can't immediately
> find a way of doing that. if we _can_ find a way of doing this, I
> suspect we'll need to do it, and give people another six months.  It's
> going to get ugly out there.  We shall see...

Define the deprecated flags as a call to a __deprecated inline function
so a warning is emitted on compile time.

Extend the reprieve of out of tree drivers to 9/2007.

Signed-off-by: Thomas Gleixner 
Acked-by: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds